I do not see National, Philips and Analog Devices in your post. How about Linear technology and Fairchild?

A while ago, I could not get a Maxim supervisor in less than 5000 and needed 5 for prototyping. With some work I dug up 5 made by Philips.

I do not know how many you need, but Maxim will give you two.

Yes, it is work, but doable.

Erik